<h2 >为什么要用转义字符串？</h2><p >HTML中<，>，&等有特殊含义（<，>，用于链接签，&用于转义），不能直接使用。这些符号是不显示在我们最终看到的网页里的，那如果我们希望在网页中显示这些符号，该怎么办呢？</p><p >这就要说到HTML转义字符串（Escape Sequence）了。</p><p ><a href="http://114.xixik.com/character/" class="f14px" title="常用HTML转义字符,html转义符" >转义字符串</a>（Escape Sequence）也称字符实体(Character Entity)。在HTML中，定义转义字符串的原因有两个：第一个原因是像“<”和“>”这类符号已经用来表示HTML标签，因此就不能直接当作文本中的符号来使用。为了在HTML文档中使用这些符号，就需要定义它的转义字符串。当解释程序遇到这类字符串时就把它解释为真实的字符。在输入转义字符串时，要严格遵守字母大小写的规则。第二个原因是，有些字符在ASCII字符集中没有定义，因此需要使用转义字符串来表示。</p><h2 >转义字符串的组成</h2><p >转义字符串（Escape Sequence），即字符实体（Character Entity）分成三部分：第一部分是一个&符号，英文叫ampersand；第二部分是实体（Entity）名字或者是#加上实体（Entity）编号；第三部分是一个分号。</p><p >比如，要显示小于号（<），就可以写 &lt; 或者 &#60; 。</p><p >用实体（Entity）名字的好处是比较好理解，一看lt，大概就猜出是less than的意思，但是其劣势在于并不是所有的浏览器都支持最新的Entity名字。而实体(Entity)编号，各种浏览器都能处理。</p><p >提示：实体名称（Entity）是区分大小写的。</p><p >备注：同一个符号，可以用“实体名称”和“实体编号”两种方式引用，“实体名称”的优势在于便于记忆，但不能保证所有的浏览器都能顺利识别它，而“实体编号”则没有这种担忧，但它实在不方便记忆。</p><h2 >如何显示空格？</h2><p >通常情况下，HTML会自动截去多余的空格。不管你加多少空格，都被看做一个空格。比如你在两个字之间加了10个空格，HTML会截去9个空格，只保留一个。为了在网页中增加空格，你可以使用&nbsp;表示空格。</p><hr/><h1 >HTML特殊转义字符列表</h1><h2 >最常用的字符实体<br/>Character Entities</h2><table width="400"><tbody><tr class="firstRow"><th >显示</th><th >说明</th><th >实体名称</th><th >实体编号</th></tr><tr><td class="key" width="40"><br/></td><td >半方大的空白</td><td >&ensp;</td><td >&#8194;</td></tr><tr><td><br/></td><td><br/></td><td><br/></td><td><br/></td></tr><tr><td class="key" width="40"><br/></td><td >全方大的空白</td><td >&emsp;</td><td >&#8195;</td></tr><tr><td><br/></td><td><br/></td><td><br/></td><td><br/></td></tr><tr><td class="key" width="40"><br/></td><td >不断行的空白格</td><td >&nbsp;</td><td >&#160;</td></tr><tr><td class="key" width="40"><</td><td >小于</td><td >&lt;</td><td >&#60;</td></tr><tr><td class="key" width="40">></td><td >大于</td><td >&gt;</td><td >&#62;</td></tr><tr><td class="key" width="40">&</td><td >&符号</td><td >&amp;</td><td >&#38;</td></tr><tr><td class="key" width="40">"</td><td >双引号</td><td >&quot;</td><td >&#34;</td></tr><tr><td class="key" width="40">©</td><td >版权</td><td >&copy;</td><td >&#169;</td></tr><tr><td class="key" width="40">®</td><td >已注册商标</td><td >&reg;</td><td >&#174;</td></tr><tr><td class="key" width="40">™</td><td >商标（美国）</td><td >™</td><td >&#8482;</td></tr><tr><td><br/></td><td><br/></td><td><br/></td><td><br/></td></tr><tr><td class="key" width="40">×</td><td >乘号</td><td >&times;</td><td >&#215;</td></tr><tr><td class="key" width="40">÷</td><td >除号</td><td >&divide;</td><td >&#247;</td></tr></tbody></table><h2 >ISO 8859-1 (Latin-1)字符集</h2><p >HTML 4.01 支持 ISO 8859-1 (Latin-1) 字符集。</p><p >备注：为了方便起见，以下表格中，“实体名称”简称为“名称”，“实体编号”简称为“编号”</p><table width="778"><tbody><tr class="firstRow"><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th></tr><tr><td class="key" width="40"><br/></td><td >&nbsp;</td><td >&#160;</td><td class="key" width="40">¡</td><td >&iexcl;</td><td >&#161;</td><td class="key" width="40">¢</td><td >&cent;</td><td >&#162;</td><td class="key" width="40">£</td><td >&pound;</td><td >&#163;</td><td class="key" width="40">¤</td><td >&curren;</td><td >&#164;</td></tr><tr><td class="key" width="40">¥</td><td >&yen;</td><td >&#165;</td><td class="key" width="40">¦</td><td >&brvbar;</td><td >&#166;</td><td class="key" width="40">§</td><td >&sect;</td><td >&#167;</td><td class="key" width="40">¨</td><td >&uml;</td><td >&#168;</td><td class="key" width="40">©</td><td >&copy;</td><td >&#169;</td></tr><tr><td class="key" width="40">ª</td><td >&ordf;</td><td >&#170;</td><td class="key" width="40">«</td><td >&laquo;</td><td >&#171;</td><td class="key" width="40">¬</td><td >&not;</td><td >&#172;</td><td class="key" width="40"><br/></td><td >&shy;</td><td >&#173;</td><td class="key" width="40">®</td><td >&reg;</td><td >&#174;</td></tr><tr><td class="key" width="40">¯</td><td >&macr;</td><td >&#175;</td><td class="key" width="40">°</td><td >&deg;</td><td >&#176;</td><td class="key" width="40">±</td><td >&plusmn;</td><td >&#177;</td><td class="key" width="40">²</td><td >&sup2;</td><td >&#178;</td><td class="key" width="40">³</td><td >&sup3;</td><td >&#179;</td></tr><tr><td class="key" width="40">´</td><td >&acute;</td><td >&#180;</td><td class="key" width="40">µ</td><td >&micro;</td><td >&#181;</td><td class="key" width="40">¶</td><td >&para;</td><td >&#182;</td><td class="key" width="40">·</td><td >&middot;</td><td >&#183;</td><td class="key" width="40">¸</td><td >&cedil;</td><td >&#184;</td></tr><tr><td class="key" width="40">¹</td><td >&sup1;</td><td >&#185;</td><td class="key" width="40">º</td><td >&ordm;</td><td >&#186;</td><td class="key" width="40">»</td><td >&raquo;</td><td >&#187;</td><td class="key" width="40">¼</td><td >&frac14;</td><td >&#188;</td><td class="key" width="40">½</td><td >&frac12;</td><td >&#189;</td></tr><tr><td class="key" width="40">¾</td><td >&frac34;</td><td >&#190;</td><td class="key" width="40">¿</td><td >&iquest;</td><td >&#191;</td><td class="key" width="40">À</td><td >&Agrave;</td><td >&#192;</td><td class="key" width="40">Á</td><td >&Aacute;</td><td >&#193;</td><td class="key" width="40">Â</td><td >&Acirc;</td><td >&#194;</td></tr><tr><td class="key" width="40">Ã</td><td >&Atilde;</td><td >&#195;</td><td class="key" width="40">Ä</td><td >&Auml;</td><td >&#196;</td><td class="key" width="40">Å</td><td >&Aring;</td><td >&#197;</td><td class="key" width="40">Æ</td><td >&AElig;</td><td >&#198;</td><td class="key" width="40">Ç</td><td >&Ccedil;</td><td >&#199;</td></tr><tr><td class="key" width="40">È</td><td >&Egrave;</td><td >&#200;</td><td class="key" width="40">É</td><td >&Eacute;</td><td >&#201;</td><td class="key" width="40">Ê</td><td >&Ecirc;</td><td >&#202;</td><td class="key" width="40">Ë</td><td >&Euml;</td><td >&#203;</td><td class="key" width="40">Ì</td><td >&Igrave;</td><td >&#204;</td></tr><tr><td class="key" width="40">Í</td><td >&Iacute;</td><td >&#205;</td><td class="key" width="40">Î</td><td >&Icirc;</td><td >&#206;</td><td class="key" width="40">Ï</td><td >&Iuml;</td><td >&#207;</td><td class="key" width="40">Ð</td><td >&ETH;</td><td >&#208;</td><td class="key" width="40">Ñ</td><td >&Ntilde;</td><td >&#209;</td></tr><tr><td class="key" width="40">Ò</td><td >&Ograve;</td><td >&#210;</td><td class="key" width="40">Ó</td><td >&Oacute;</td><td >&#211;</td><td class="key" width="40">Ô</td><td >&Ocirc;</td><td >&#212;</td><td class="key" width="40">Õ</td><td >&Otilde;</td><td >&#213;</td><td class="key" width="40">Ö</td><td >&Ouml;</td><td >&#214;</td></tr><tr><td class="key" width="40">×</td><td >&times;</td><td >&#215;</td><td class="key" width="40">Ø</td><td >&Oslash;</td><td >&#216;</td><td class="key" width="40">Ù</td><td >&Ugrave;</td><td >&#217;</td><td class="key" width="40">Ú</td><td >&Uacute;</td><td >&#218;</td><td class="key" width="40">Û</td><td >&Ucirc;</td><td >&#219;</td></tr><tr><td class="key" width="40">Ü</td><td >&Uuml;</td><td >&#220;</td><td class="key" width="40">Ý</td><td >&Yacute;</td><td >&#221;</td><td class="key" width="40">Þ</td><td >&THORN;</td><td >&#222;</td><td class="key" width="40">ß</td><td >&szlig;</td><td >&#223;</td><td class="key" width="40">à</td><td >&agrave;</td><td >&#224;</td></tr><tr><td class="key" width="40">á</td><td >&aacute;</td><td >&#225;</td><td class="key" width="40">â</td><td >&acirc;</td><td >&#226;</td><td class="key" width="40">ã</td><td >&atilde;</td><td >&#227;</td><td class="key" width="40">ä</td><td >&auml;</td><td >&#228;</td><td class="key" width="40">å</td><td >&aring;</td><td >&#229;</td></tr><tr><td class="key" width="40">æ</td><td >&aelig;</td><td >&#230;</td><td class="key" width="40">ç</td><td >&ccedil;</td><td >&#231;</td><td class="key" width="40">è</td><td >&egrave;</td><td >&#232;</td><td class="key" width="40">é</td><td >&eacute;</td><td >&#233;</td><td class="key" width="40">ê</td><td >&ecirc;</td><td >&#234;</td></tr><tr><td class="key" width="40">ë</td><td >&euml;</td><td >&#235;</td><td class="key" width="40">ì</td><td >&igrave;</td><td >&#236;</td><td class="key" width="40">í</td><td >&iacute;</td><td >&#237;</td><td class="key" width="40">î</td><td >&icirc;</td><td >&#238;</td><td class="key" width="40">ï</td><td >&iuml;</td><td >&#239;</td></tr><tr><td class="key" width="40">ð</td><td >&eth;</td><td >&#240;</td><td class="key" width="40">ñ</td><td >&ntilde;</td><td >&#241;</td><td class="key" width="40">ò</td><td >&ograve;</td><td >&#242;</td><td class="key" width="40">ó</td><td >&oacute;</td><td >&#243;</td><td class="key" width="40">ô</td><td >&ocirc;</td><td >&#244;</td></tr><tr><td class="key" width="40">õ</td><td >&otilde;</td><td >&#245;</td><td class="key" width="40">ö</td><td >&ouml;</td><td >&#246;</td><td class="key" width="40">÷</td><td >&divide;</td><td >&#247;</td><td class="key" width="40">ø</td><td >&oslash;</td><td >&#248;</td><td class="key" width="40">ù</td><td >&ugrave;</td><td >&#249;</td></tr><tr><td class="key" width="40">ú</td><td >&uacute;</td><td >&#250;</td><td class="key" width="40">û</td><td >&ucirc;</td><td >&#251;</td><td class="key" width="40">ü</td><td >&uuml;</td><td >&#252;</td><td class="key" width="40">ý</td><td >&yacute;</td><td >&#253;</td><td class="key" width="40">þ</td><td >&thorn;</td><td >&#254;</td></tr><tr><td class="key" width="40">ÿ</td><td >&yuml;</td><td >&#255;</td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td></tr></tbody></table><h2 >数学和希腊字母标志<br/>symbols, mathematical symbols, and Greek letters</h2><table width="778"><tbody><tr class="firstRow"><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th></tr><tr><td class="key" width="40">ƒ</td><td >&fnof;</td><td >&#402;</td><td class="key" width="40">Α</td><td >&Alpha;</td><td >&#913;</td><td class="key" width="40">Β</td><td >&Beta;</td><td >&#914;</td><td class="key" width="40">Γ</td><td >&Gamma;</td><td >&#915;</td><td class="key" width="40">Δ</td><td >&Delta;</td><td >&#916;</td></tr><tr><td class="key" width="40">Ε</td><td >&Epsilon;</td><td >&#917;</td><td class="key" width="40">Ζ</td><td >&Zeta;</td><td >&#918;</td><td class="key" width="40">Η</td><td >&Eta;</td><td >&#919;</td><td class="key" width="40">Θ</td><td >&Theta;</td><td >&#920;</td><td class="key" width="40">Ι</td><td >&Iota;</td><td >&#921;</td></tr><tr><td class="key" width="40">Κ</td><td >&Kappa;</td><td >&#922;</td><td class="key" width="40">Λ</td><td >&Lambda;</td><td >&#923;</td><td class="key" width="40">Μ</td><td >&Mu;</td><td >&#924;</td><td class="key" width="40">Ν</td><td >&Nu;</td><td >&#925;</td><td class="key" width="40">Ξ</td><td >&Xi;</td><td >&#926;</td></tr><tr><td class="key" width="40">Ο</td><td >&Omicron;</td><td >&#927;</td><td class="key" width="40">Π</td><td >&Pi;</td><td >&#928;</td><td class="key" width="40">Ρ</td><td >&Rho;</td><td >&#929;</td><td class="key" width="40">Σ</td><td >&Sigma;</td><td >&#931;</td><td class="key" width="40">Τ</td><td >&Tau;</td><td >&#932;</td></tr><tr><td class="key" width="40">Υ</td><td >&Upsilon;</td><td >&#933;</td><td class="key" width="40">Φ</td><td >&Phi;</td><td >&#934;</td><td class="key" width="40">Χ</td><td >&Chi;</td><td >&#935;</td><td class="key" width="40">Ψ</td><td >&Psi;</td><td >&#936;</td><td class="key" width="40">Ω</td><td >&Omega;</td><td >&#937;</td></tr><tr><td class="key" width="40">α</td><td >&alpha;</td><td >&#945;</td><td class="key" width="40">β</td><td >&beta;</td><td >&#946;</td><td class="key" width="40">γ</td><td >&gamma;</td><td >&#947;</td><td class="key" width="40">δ</td><td >&delta;</td><td >&#948;</td><td class="key" width="40">ε</td><td >&epsilon;</td><td >&#949;</td></tr><tr><td class="key" width="40">ζ</td><td >&zeta;</td><td >&#950;</td><td class="key" width="40">η</td><td >&eta;</td><td >&#951;</td><td class="key" width="40">θ</td><td >&theta;</td><td >&#952;</td><td class="key" width="40">ι</td><td >&iota;</td><td >&#953;</td><td class="key" width="40">κ</td><td >&kappa;</td><td >&#954;</td></tr><tr><td class="key" width="40">λ</td><td >&lambda;</td><td >&#955;</td><td class="key" width="40">μ</td><td >&mu;</td><td >&#956;</td><td class="key" width="40">ν</td><td >&nu;</td><td >&#957;</td><td class="key" width="40">ξ</td><td >&xi;</td><td >&#958;</td><td class="key" width="40">ο</td><td >&omicron;</td><td >&#959;</td></tr><tr><td class="key" width="40">π</td><td >&pi;</td><td >&#960;</td><td class="key" width="40">ρ</td><td >&rho;</td><td >&#961;</td><td class="key" width="40">ς</td><td >&sigmaf;</td><td >&#962;</td><td class="key" width="40">σ</td><td >&sigma;</td><td >&#963;</td><td class="key" width="40">τ</td><td >&tau;</td><td >&#964;</td></tr><tr><td class="key" width="40">υ</td><td >&upsilon;</td><td >&#965;</td><td class="key" width="40">φ</td><td >&phi;</td><td >&#966;</td><td class="key" width="40">χ</td><td >&chi;</td><td >&#967;</td><td class="key" width="40">ψ</td><td >&psi;</td><td >&#968;</td><td class="key" width="40">ω</td><td >&omega;</td><td >&#969;</td></tr><tr><td class="key" width="40">?</td><td >&thetasym;</td><td >&#977;</td><td class="key" width="40">?</td><td >&upsih;</td><td >&#978;</td><td class="key" width="40">?</td><td >&piv;</td><td >&#982;</td><td class="key" width="40">•</td><td >&bull;</td><td >&#8226;</td><td class="key" width="40">…</td><td >&hellip;</td><td >&#8230;</td></tr><tr><td class="key" width="40">′</td><td >&prime;</td><td >&#8242;</td><td class="key" width="40">″</td><td >&Prime;</td><td >&#8243;</td><td class="key" width="40">‾</td><td >&oline;</td><td >&#8254;</td><td class="key" width="40">⁄</td><td >&frasl;</td><td >&#8260;</td><td class="key" width="40">℘</td><td >&weierp;</td><td >&#8472;</td></tr><tr><td class="key" width="40">ℑ</td><td >&image;</td><td >&#8465;</td><td class="key" width="40">ℜ</td><td >&real;</td><td >&#8476;</td><td class="key" width="40">™</td><td >&trade;</td><td >&#8482;</td><td class="key" width="40">ℵ</td><td >&alefsym;</td><td >&#8501;</td><td class="key" width="40">←</td><td >&larr;</td><td >&#8592;</td></tr><tr><td class="key" width="40">↑</td><td >&uarr;</td><td >&#8593;</td><td class="key" width="40">→</td><td >&rarr;</td><td >&#8594;</td><td class="key" width="40">↓</td><td >&darr;</td><td >&#8595;</td><td class="key" width="40">↔</td><td >&harr;</td><td >&#8596;</td><td class="key" width="40">↵</td><td >&crarr;</td><td >&#8629;</td></tr><tr><td class="key" width="40">⇐</td><td >&lArr;</td><td >&#8656;</td><td class="key" width="40">⇑</td><td >&uArr;</td><td >&#8657;</td><td class="key" width="40">⇒</td><td >&rArr;</td><td >&#8658;</td><td class="key" width="40">⇓</td><td >&dArr;</td><td >&#8659;</td><td class="key" width="40">⇔</td><td >&hArr;</td><td >&#8660;</td></tr><tr><td class="key" width="40">∀</td><td >&forall;</td><td >&#8704;</td><td class="key" width="40">∂</td><td >&part;</td><td >&#8706;</td><td class="key" width="40">∃</td><td >&exist;</td><td >&#8707;</td><td class="key" width="40">∅</td><td >&empty;</td><td >&#8709;</td><td class="key" width="40">∇</td><td >&nabla;</td><td >&#8711;</td></tr><tr><td class="key" width="40">∈</td><td >&isin;</td><td >&#8712;</td><td class="key" width="40">∉</td><td >&notin;</td><td >&#8713;</td><td class="key" width="40">∋</td><td >&ni;</td><td >&#8715;</td><td class="key" width="40">∏</td><td >&prod;</td><td >&#8719;</td><td class="key" width="40">∑</td><td >&sum;</td><td >&#8721;</td></tr><tr><td class="key" width="40">−</td><td >&minus;</td><td >&#8722;</td><td class="key" width="40">∗</td><td >&lowast;</td><td >&#8727;</td><td class="key" width="40">√</td><td >&radic;</td><td >&#8730;</td><td class="key" width="40">∝</td><td >&prop;</td><td >&#8733;</td><td class="key" width="40">∞</td><td >&infin;</td><td >&#8734;</td></tr><tr><td class="key" width="40">∠</td><td >&ang;</td><td >&#8736;</td><td class="key" width="40">∧</td><td >&and;</td><td >&#8743;</td><td class="key" width="40">∨</td><td >&or;</td><td >&#8744;</td><td class="key" width="40">∩</td><td >&cap;</td><td >&#8745;</td><td class="key" width="40">∪</td><td >&cup;</td><td >&#8746;</td></tr><tr><td class="key" width="40">∫</td><td >&int;</td><td >&#8747;</td><td class="key" width="40">∴</td><td >&there4;</td><td >&#8756;</td><td class="key" width="40">∼</td><td >&sim;</td><td >&#8764;</td><td class="key" width="40">∝</td><td >&cong;</td><td >&#8773;</td><td class="key" width="40">≈</td><td >&asymp;</td><td >&#8776;</td></tr><tr><td class="key" width="40">≠</td><td >&ne;</td><td >&#8800;</td><td class="key" width="40">≡</td><td >&equiv;</td><td >&#8801;</td><td class="key" width="40">≤</td><td >&le;</td><td >&#8804;</td><td class="key" width="40">≥</td><td >&ge;</td><td >&#8805;</td><td class="key" width="40">⊂</td><td >&sub;</td><td >&#8834;</td></tr><tr><td class="key" width="40">⊃</td><td >&sup;</td><td >&#8835;</td><td class="key" width="40">⊄</td><td >&nsub;</td><td >&#8836;</td><td class="key" width="40">⊆</td><td >&sube;</td><td >&#8838;</td><td class="key" width="40">⊇</td><td >&supe;</td><td >&#8839;</td><td class="key" width="40">⊕</td><td >&oplus;</td><td >&#8853;</td></tr><tr><td class="key" width="40">⊗</td><td >&otimes;</td><td >&#8855;</td><td class="key" width="40">⊥</td><td >&perp;</td><td >&#8869;</td><td class="key" width="40">⋅</td><td >&sdot;</td><td >&#8901;</td><td class="key" width="40">?</td><td >&lceil;</td><td >&#8968;</td><td class="key" width="40">?</td><td >&rceil;</td><td >&#8969;</td></tr><tr><td class="key" width="40">?</td><td >&lfloor;</td><td >&#8970;</td><td class="key" width="40">?</td><td >&rfloor;</td><td >&#8971;</td><td class="key" width="40">?</td><td >&lang;</td><td >&#9001;</td><td class="key" width="40">?</td><td >&rang;</td><td >&#9002;</td><td class="key" width="40">◊</td><td >&loz;</td><td >&#9674;</td></tr><tr><td class="key" width="40">♠</td><td >&spades;</td><td >&#9824;</td><td class="key" width="40">♣</td><td >&clubs;</td><td >&#9827;</td><td class="key" width="40">♥</td><td >&hearts;</td><td >&#9829;</td><td class="key" width="40">♦</td><td >&diams;</td><td >&#9830;</td><td ><br/></td><td ><br/></td><td ><br/></td></tr></tbody></table><h2 >重要的国际标记<br/>markup-significant and internationalization characters</h2><table width="778"><tbody><tr class="firstRow"><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th><th >显示</th><th >名称</th><th >编号</th></tr><tr><td class="key" width="40">"</td><td >&quot;</td><td >&#34;</td><td class="key" width="40">&</td><td >&amp;</td><td >&#38;</td><td class="key" width="40"><</td><td >&lt;</td><td >&#60;</td><td class="key" width="40">></td><td >&gt;</td><td >&#62;</td><td class="key" width="40">Œ</td><td >&OElig;</td><td >&#338;</td></tr><tr><td class="key" width="40">œ</td><td >&oelig;</td><td >&#339;</td><td class="key" width="40">Š</td><td >&Scaron;</td><td >&#352;</td><td class="key" width="40">š</td><td >&scaron;</td><td >&#353;</td><td class="key" width="40">Ÿ</td><td >&Yuml;</td><td >&#376;</td><td class="key" width="40">ˆ</td><td >&circ;</td><td >&#710;</td></tr><tr><td class="key" width="40">˜</td><td >&tilde;</td><td >&#732;</td><td class="key" width="40"><br/></td><td >&ensp;</td><td >&#8194;</td><td class="key" width="40"><br/></td><td >&emsp;</td><td >&#8195;</td><td class="key" width="40"><br/></td><td >&thinsp;</td><td >&#8201;</td><td class="key" width="40"></td><td >&zwnj;</td><td >&#8204;</td></tr><tr><td class="key" width="40"></td><td >&zwj;</td><td >&#8205;</td><td class="key" width="40"></td><td >&lrm;</td><td >&#8206;</td><td class="key" width="40"></td><td >&rlm;</td><td >&#8207;</td><td class="key" width="40">–</td><td >&ndash;</td><td >&#8211;</td><td class="key" width="40">—</td><td >&mdash;</td><td >&#8212;</td></tr><tr><td class="key" width="40">‘</td><td >&lsquo;</td><td >&#8216;</td><td class="key" width="40">’</td><td >&rsquo;</td><td >&#8217;</td><td class="key" width="40">‚</td><td >&sbquo;</td><td >&#8218;</td><td class="key" width="40">“</td><td >&ldquo;</td><td >&#8220;</td><td class="key" width="40">”</td><td >&rdquo;</td><td >&#8221;</td></tr><tr><td class="key" width="40">„</td><td >&bdquo;</td><td >&#8222;</td><td class="key" width="40">†</td><td >&dagger;</td><td >&#8224;</td><td class="key" width="40">‡</td><td >&Dagger;</td><td >&#8225;</td><td class="key" width="40">‰</td><td >&permil;</td><td >&#8240;</td><td class="key" width="40">‹</td><td >&lsaquo;</td><td >&#8249;</td></tr><tr><td class="key" width="40">›</td><td >&rsaquo;</td><td >&#8250;</td><td class="key" width="40">€</td><td >&euro;</td><td >&#8364;</td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td><td ><br/></td></tr></tbody></table><hr/><h2 >JavaScript转义符</h2><table width="480"><tbody><tr class="firstRow"><th width="35%" >转义序列</th><th width="65%" >字符</th></tr><tr valign="top"><td width="35%" >b</td><td width="65%" >退格</td></tr><tr valign="top"><td width="35%" >f</td><td width="65%" >走纸换页</td></tr><tr valign="top"><td width="35%" >n</td><td width="65%" >换行</td></tr><tr valign="top"><td width="35%" >r</td><td width="65%" >回车</td></tr><tr valign="top"><td width="35%" >t</td><td width="65%" >横向跳格 (Ctrl-I)</td></tr><tr valign="top"><td width="35%" >'</td><td width="65%" >单引号</td></tr><tr valign="top"><td width="35%" >"</td><td width="65%" >双引号</td></tr><tr valign="top"><td width="35%" >\</td><td width="65%" >反斜杠</td></tr></tbody></table><p >编程的时候要注意特殊字符的问题，很多运行时出现的问题都是因为特殊字符的出现而引起的。</p><p >注意，由于反斜杠本身用作转义符，因此不能直接在脚本中键入一个反斜杠。如果要产生一个反斜杠，必须一起键入两个反斜杠 (\)。</p><p>编码转换（to Unicode）</p><p>（程序代码来源于网络）</p><p>Js版</p><p><script></p><p> test = "你好abc"</p><p> str = ""</p><p> for( i=0; i<test.length; i++ )</p><p> {</p><p> temp = test.charCodeAt(i).toString(16);</p><p> str += "\u"+ new Array(5-String(temp).length).join("0") +temp;</p><p> }</p><p> document.write (str)</p><p></script></p><p>vbs版</p><p>Function Unicode(str1)</p><p> Dim str,temp</p><p> str = ""</p><p> For i=1 to len(str1)</p><p> temp = Hex(AscW(Mid(str1,i,1)))</p><p> If len(temp) < 5 Then temp = right("0000" & temp, 4)</p><p> str = str & "u" & temp</p><p> Next</p><p> Unicode = str</p><p>End Function</p><p>Function htmlentities(str)</p><p> For i = 1 to Len(str)</p><p> char = mid(str, i, 1)</p><p> If Ascw(char) > 128 then</p><p> htmlentities = htmlentities & "&#" & Ascw(char) & ";"</p><p> Else</p><p> htmlentities = htmlentities & char</p><p> End if</p><p> Next</p><p>End Function</p><p>coldfusion版</p><p>function nochaoscode(str)</p><p>{</p><p> var new_str = "";</p><p> for(i=1; i lte len(str);i=i+1){</p><p> if(asc(mid(str,i,1)) lt 128){</p><p> new_str = new_str & mid(str,i,1);</p><p> }else{</p><p> new_str = new_str & "&##" & asc(mid(str,i,1));</p><p> }</p><p> }</p><p> return new_str;</p><p>}</p><p>附：</p><p>在php中我们可以用mbstring的mb_convert_encoding函数实现这个正向及反向的转化。 如：</p><p>mb_convert_encoding ("你好", "HTML-ENTITIES", "gb2312"); //输出：&#20320;&#22909;</p><p>mb_convert_encoding ("&#20320;&#22909;", "gb2312", "HTML-ENTITIES"); //输出：你好</p><p>如果需要对整个页面转化，则只需要在php文件的头部加上这三行代码：</p><p>mb_internal_encoding("gb2312"); // 这里的gb2312是你网站原来的编码</p><p>mb_http_output("HTML-ENTITIES");</p><p>ob_start('mb_output_handler');</p>